To import graphics from a file, select File > Import… from the main menu and choose a file. Alternatively, you can drag and drop an image from Finder to your document. These methods can be used with SVG files as well as with other formats such as TIFF, PNG, JPEG, PDF, EPS, HEIC and AI.
Raster graphic files that you import appear in your document as a rectangle filled with the imported image. When you import an image in a vector format such as SVG or PDF, the app works with it differently.
An imported SVG image becomes a Clipping Group. To access or edit the elements that are parts of the image, use the Layers Panel. You can also split the Clipping Group into separate objects. To do that, use the Modify > Release Clipping Mask command from the main menu.
When you import a PDF, you can see it in your document as one object. To edit it, you have to split it into parts with help of the Modify > Expand command from the main menu. The object will turn into a Clipping Group. Then use the Modify > Release Clipping Mask command.
If you want to fill a shape with an image, open the Color panel and choose the Image tab. Then select a graphic file. Note that the Color panel does not support the SVG format.